The terms of service still apply. If you choose not to follow them, don’t complain when they stop allowing you access. Nobody _needs_ to access YouTube so there’s no harm in not having access to their service.
Nobody signs any terms of service except the subscribers of a membership accounts. Nobody is bound to terms listed in a small link hidden somewhere in the page.
Besides, I checked the terms of service in this page[1] today and nowhere is it written that people are forced to look at the ads and can't turn away. And rightfully so it would be illegal to have such terms in most juridictions. So even those that are aware of those terms because they actually looked for them ought to see the ads.
